Toyota RAV4 (XA40) 2013-2018 Service Manual: System description
- Engine immobiliser system description
The engine immobiliser system is designed to prevent the vehicle from being stolen. This system uses a transponder key ecu that stores the key codes of authorized ignition keys. If an attempt is made to start the engine using an unauthorized key, the ecu sends a signal to the ecm to prohibit fuel delivery and ignition, effectively disabling the engine.
- Function of main component
- System function
- When the transponder key ecu detects that the
unlock warning switch is on, the ecu provides
current to the transponder key coil and produces a
faint electric wave. A transponder chip in the key grip
receives the wave and outputs a key id code signal.
The transponder key coil receives this signal, the transponder key amplifier amplifies it, and then the signal is transmitted to the ecu. The ecu matches the key's id code with the vehicle's id code, which was previously registered in the ecu and then communicates the results to the ecm using sfi communication.
- After the identification results show that the key's id code matches the vehicle's id code and the ecu has confirmed their match: 1) the engine immobiliser system is canceled and the engine starting controls (fuel injection control and ignition control) enter standby mode; and 2) the ecu receives a security indicator light signal, and turns the security indicator light off.
Engine immobiliser system
Parts location
System diagram
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How to proceed with troubleshooting
Hint:
Use these procedures to troubleshoot the engine immobiliser
system.
*: Use the intelligent tester.
Vehicle brought to workshop
Inspect battery voltage
Standard voltage:
11 t ...
Other materials:
Problem symptoms table
Hint:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms
are listed in order of probability in the "suspected area"
column of the table. Check each symptom by checking the
suspected areas in the order they are listed. Re ...
Crankshaft position sensor "A"
Description
The crankshaft position (ckp) sensor system consists of a ckp sensor plate
and a pickup coil.
The sensor plate has 34 teeth and is installed on the crankshaft. The pickup
coil is made of wound copper
wire, an iron core and magnet. The sensor plate rotates and, as each tooth ...
Blind Spot Monitor operation
â– Objects that can be detected while driving
The Blind Spot Monitor uses rear side radar sensors to detect the
following vehicles traveling in adjacent lanes and advises the driver
of the presence of such vehicles via the indicators on the outside
rear view mirrors.
Vehicles that are traveling ...
